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Version #2 Homestake Proposal THE NATIONAL UNDERGROUND SCIENCE AND ENGINEERING LABORATORY AT HOMESTAKE: PROJECT BOOK, REFERENCE DESIGN STAGE A Facility for Physics, Astrophysics, EarthLab, Applied Science and Engineering, and Outreach/Education July, 2003 submitted by The Homestake Collaboration A-1 The Homestake Collaboration Executive Committee Baha Balantekin, University of Wisconsin Thomas Bowles, Los Alamos National Laboratory Janet Conrad, Columbia University Sherry Farwell, South Dakota School of Mines and Technology Wick Haxton, University of Washington Ken Lande, University of Pennsylvania Kevin Lesko, Lawrence Berkeley Laboratory Bill Marciano, Brookhaven National Laboratory Marvin Marshak, University of Minnesota Tullis Onstott, Princeton University Michael Shaevitz, Columbia University John Wilkerson, University of Washington Scientific Advisor to the Executive Committee John Bahcall, Institute for Advanced Study Earth Science Steering Committee Brian McPherson, New Mexico Tech Tullis Onstott, Princeton Tommy Phelps, ORNL Bill Roggenthen, SDSM&T Herb Wang, Wisconsin Joe Wang, LBNL Collaboration Members Craig Aalseth, Pacific Northwest National Laboratory Daniel S. Akerib, Case Western Reserve University Steven Anderson, Black Hills State University Elena Aprile, Columbia University Frank T. Avignone III, University of South Carolina Tom Barket, South Dakota Science Teachers Association Laura Baudis, Stanford University John F. Beacom, Fermilab Mark Boulay, Los Alamos National Laboratory George Brimhall, UC Berkeley Len Bugel, Fermilab Thomas Campbell, SDSM&T Art Champagne, University of North Carolina Juan I. Collar, University of Chicago F.S. Colwell, Idaho National Engineering and Environmental Laboratory Peter Doe, University of Washington Michael Dragowsky, Case Western Reserve University Ed Duke, SDSM&T Dan Durben, Black Hills State University Tom Durkin, SDSM&T Hiro Ejiri, RCNP, Osaka University Steve Elliott, University of Washington Royce Engstrom, University of South Dakota Joseph Formaggio, University of Washington A-2 Jim Fredrickson, Pacific Northwest National Laboratory George M. Fuller, University of California, San Diego Richard Gaitskell, Brown University Maury Goodman, Argonne National Laboratory Uwe Greife, Colorado School of Mines Alec Habig, University of Minnesota Duluth Andre Hamer (deceased), Los Alamos National Laboratory Frank Hartmann, Max Planck Institute, Heidelberg Karsten M. Heeger, Lawrence Berkeley National Laboratory Andrew Hime, Los Alamos National Laboratory Zbignew (Ziggy) J. Hladysz, Mining Engineering Program, SDSM&T Chang Kee Jung, The State University of New York at Stony Brook Jon Kellar, SDSM&T Thomas L. Kieft, New Mexico Institute of Mining and Technology Sally Koutsoliotas, Bucknell University Robert Lanou, Brown University Barbara Sherwood Lollar, University of Toronto Clark McGrew, SUNY at Stony Brook Harry Miley, Pacific Northwest National Laboratory Jeffrey S. Nico, National Institute of Standards and Technology Bob Noiva, University of South Dakota Peter Parker, Yale University Tommy J. Phelps, Oak Ridge National Laboratory Andreas Piepke, University of Alabama Alan Poon, Lawrence Berkeley National Laboratory Lisa M. Pratt, Indiana University Jan Puszynski, SDSM&T Bill Roggenthen, SDSM&T Bernard Sadoulet, University of California, Berkeley Ben Sayler, Black Hills State University Richard Schnee, Case Western Reserve University Kate Scholberg, MIT Tom Shutt, Princeton University Panagiotis Spentzouris, Fermilab Robert Svoboda, LSU Joseph S. Y. Wang, Lawrence Berkeley National Laboratory Peter J. Wierenga, University of Arizona Raymond Wildung, Pacific Northwest National Laboratory Paul Wildenhain, University of Pennsylvania Patrick R Zimmerman, Institute of Atmospheric Sciences, SDSM&T Collaboration Engineers Jerry Aberle, Lead John Marks, Lead Gary Kuhl, Skyline Engineering Jamie Stampe, Skyline Engineering A-3 A. PROJECT SUMMARY This proposal is a condensed version of the Project Book for the National Underground Science Laboratory, Homestake, at the Reference Design stage. This submission represents a major step beyond the conceptual proposal our group submitted in June 2001. Much of the past two years was invested in strengthening and broadening the science case – an effort that involved not only our collaboration, but many of our colleagues in the broader science community who are interested in underground science. The science case itself has changed, with major new discoveries in neutrino physics occurring since June 2001, and with the development of a compelling program of NUSEL earth science. The community’s arguments for NUSEL are summarized in the Science Book. In parallel with the science effort, our group has learned a great deal about the Homestake site and how it can be best adapted to meet the science requirements. This has led to the Science Timeline and Reference Design, and a facilities development plan much improved over that of the conceptual proposal. We describe this design – the access to underground, the underground and surface campuses, and the options remaining to be explored – and the engineering studies that allow us to assign costs and contingencies. We also describe the work remaining to be done and the program plan for producing a Baseline Definition of the Homestake project. This project began in September 2000, when the INT hosted a group of 200 neutrino physicists in Seattle to discuss, in connection with the NSAC Long-Range Plan (LRP) for nuclear physics, possible priorities for this subfield. The deliberations of one of the meeting’s working groups, on Underground Science Laboratories, was dramatically influenced by a proposal Lande made at this meeting, conversion of the Homestake Gold Mine into a National Underground Science and Engineering Laboratory (NUSEL). The availability of this very deep site, with massive shafts and lifts, sophisticated utilities, ventilation, and communications systems, and established operations costs, prompted the NSAC Town Meeting group to make the creation of NUSEL its highest priority. The National Science Foundation and Department of Energy responded by supporting an ad hoc study group, the Bahcall Committee, to consider the scientific case for NUSEL and the suitability of possible sites. The Committee’s membership included leading underground scientists from particle, nuclear, and astrophysics. Its consultants included experts in earth science and large project management. The Bahcall Report, submitted to NSAC as a LRP White Paper, made a compelling scientific case for NUSEL and identified Homestake as the recommended site. In its final deliberations the NSAC LRP group made creation of a deep underground science laboratory its highest midscale construction priority for the next decade. Because Homestake closure plans limited the window in time when this site would be available, NSAC also wrote the NSF, urging the agency to proceed immediately with NUSEL-Homestake. Following this decision a national group of underground scientists, several of whom had taken part in the Bahcall Committee and the Seattle, Oakland, and Santa Fe NSAC LRP meetings, collaborated on a NUSEL-Homestake proposal. This MRE proposal was submitted to the NSF in early June 2001, and was reviewed by the Physics Division later that summer. The results of the reviews – the Physics Division conducted two panel reviews in addition to soliciting written reviews – were shared with the proposers in October 2001. Since submission of the original proposal, the creation of NUSEL and the associated science have generated extensive discussions in the scientific community. In HEPAP’s long-range plan, which was debated over the last six months of 2001, neutrino physics, dark matter searches, and other underground science received strong support. Two high-level NRC committees reviewed the science arguments for NUSEL, both concluding that a deep US laboratory is needed. Major changes in the science have resulted from discoveries subsequent to June, 2001, including the Sudbury Neutrino Observatory demonstration that the solar neutrino flux is dominated by heavy-flavor neutrinos, the KamLAND verification of solar neutrino oscillations, the K2K results, and the identification of thermophilic methanogens at the 8000 ft level of Homestake. New communities, most notably those advocating NUSEL-Homestake as an “EarthLab” for earth science, geomicromiology, and rock mechanics/engineering and those concerned with applications of new detector technologies to a variety of post-9/11 issues, have joined the collaboration. A series of conferences and workshops – the Lead meetings on Underground Science and on A-4 Geomicrobiology, the Aspen Workshop on Underground Science, and the NSF-sponsored NESS02 conference – not only contributed to broadening the science, but also clarified the technical requirements (depth, space, utility needs) and readiness of proposed experiments. (These meetings were either organized by the NUSEL-Homestake Collaboration or strongly supported by our members. The materials from these meetings – talks presented, working group white papers – have been preserved on the NUSEL-Homestake web page, http://int.phys.washington.edu/NUSEL/.) Major improvements in the NUSEL design have occurred, allowing us to avoid the costly Yates shaft extension while providing a more versatile laboratory that meets the needs of our broader collaboration. Finally, we have continued to develop partnerships nationally and in the region with the goal of enhancing the public outreach potential
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